Re: Samsung S42SD-YD04 No picture, sound OK
Thanks very much for the input, think it is time to retire this set due to the age.
Karnak
Member
Last Activity: 03-11-2013, 01:14 PM
Joined: 02-18-2013
Location: Chicago. Illinois
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Re: Samsung S42SD-YD04 No picture, sound OK
Disconnected the Y driver board and the X driver board. All voltages where were they should be. Connected the Y driver board the Ve voltage 0 Vs voltage 19.8 all other voltages ok. Disconnected Y driver board, connected X driver board, Ve voltage moving back forth 31-107 volts, Vs voltage moving 17-36, all others normal. Both boards connected-- Ve 0, Vs 22, all others normal. Seems strange that both X and Y boards bad together.Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
Thanks for the response, will get back with info on boards disconnected.Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
I will give that a try. Also a question, should you see ac voltages anywhere, coming off the power board??Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
Vs 87 on stickerLeave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
Ok Checked the label: listed the following: VA 79 , VSC 78 , VS 87 , VE 107 , Vset 93. Following values were measured: VA 75 dc , VSC 75 dc - 160 ac , VS 21dc , VE 0 ac or dc , Vset 0 ac or dc. At this point I assume it is the power board. These were test points identified on the power board.Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
OK will check, may take a day or two.Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
I will check the board closer. All I was reading were the lower voltages 12, 3.3, 5. I don't see an references to the higher voltages in the schematic block diagram in the service manual.Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
Yes I have a DMM. Which board are you referring to and at what point?Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
Was able to get a service manual downloaded. Got over to nephews and got some pictures. First when plunging in the set you get a solid red led light. Press on button, relay engages on power board, red led flashes 5 times and goes out. I check voltages coming off power board all seem good. AS per reading in the manual I check the switch on the logic board. Position 1 on, 2 on, 3 off, & 4on.
AS per the manual I set the switch Position 1 on, 2 off, 3 on, & 4 off.
Quote from manual:
...Leave a comment:
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Re: Samsung S42SD-YD04 No picture, sound OK
The tv is at my nephews will get a picture soon and post it.Leave a comment:
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Samsung S42SD-YD04 No picture, sound OK
Took the set apart and the four large capacitors looked swollen on the power board. Replaced all four, thought this would solve the problem, still no picture, Started spot checking surrounding boards all seem to have some power. One board has has a small green led. When set is turned on it is blinking. Have pictures of the power board....
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